Patent GB-116897-A (GB)
Title: Method of and Apparatus for Regulating Automatically the Cutting of the Holes in Jacquard Cards.
Inventor: DAMM ARVID GERHARD
IPC: D03C17/00
Filed: 1918-06-17
Abstract: 116,897. Damm, A. G. June 9, 1917, [Convention date]. Cards, punching.-A design sheet with opaque and transparent parts is moved into successive positions between a source of light and a camera containing selenium cells adapted to be influenced by the rays of light passing through the transparent parts to effect through relays the closure of electric circuits containing electro-magnetic means for controlling the bolts of an ordinary card-cutting machine. As shown, the light from an electric lamp 6 provided with a reflector 8 and lenses 9 is thrown on to the space occupied by a number, say eight, of the small squares of an horizontal row of a design 2 corresponding to the number of needles in each transverse row of the jacquard. The light rays passing through the transparent squares pass into a camera 3, where they may be focused by a lens 4, and on to selenium cells 5, each in a circuit including a battery 13 and the windings of a relay device 10. When a relav is closed, a solenoid 17 in the corresponding circuit, which contains a battery 16 and an interrupter 20, is energized, and its core 25 acts through a spring-controlled rod 26, a lever 30, and a rod 31 to move a bolt 32 out of position to actuate a punch 34 of the cutting-machine. If one or more levers 30 are moved, a bar 37 is depressed thereby and an interrupter 39 closes a circuit including the battery 16, the interrupter 20, and a solenoid 38, which is energized so that its core 47 acts through a rod 48, cross-head 49, and rods 51 to depress the punching-head 35 to punch a line of holes on the card 36. Depression of the heads 35 causes an interrupter 56 to break the circuit of the lamp 6, and the upper of two pins 63 on a rod 62 connected to the core 47 acts on an arm 61 to open the interrupter 20 and break the circuits of the solenoids 17, 38. The parts then return to their initial positions, the interrupter 56 is closed, and the lamp 6 re-lit. When the rod 62 is depressed, it acts through an interrupter 79 to close the circuit of an electro-magnet 75 to move a double-acting catch 74 to permit the movement through half a tooth of a rack 73. This rack is connected by a guided cord to a slidable frame carrying the design, the frame being acted upon by another cord connected to a weight &c. so as to move under control of the rack and its catch 74. The return movement of the rod 62 breaks the circuit of the magnet 75, and the catch 74 returns to its normal position, allowing the rack to make another movement. The two movements of the rack permit movement of the design through the space of the eight squares which have controlled the complete punching operation, and another series of eight squares are moved into operative position. When an horizontal row of squares is completed, the design frame acts on an interrupter 82 to break the circuits of the solenoids 17, 38, and the frame is moved vertically, through rack-and-pinion mechanism controlled by a ratchet-wheel, and set to commence the reading of the next row of squares, the interrupter 82 being closed. The card 36 is moved step by step in the known manner, and a punched card is replaced by a fresh card. Designs in two or more colours for producing cards for controlling two or more sets of threads may be photographed with the aid of colour filters to produce negative or positive designs partly opaque and partly transparent for use with the invention.